Design of the Radiator for detection part of the Submilimetre Wave Instrument (SWI) of JUICE mission

ESA JUICE Mission - JUpiter ICy moons Explorer – which is planned for launch in 2022 - would be consisted of 11 science instruments. For one of them – SWI (Submillimetre Wave Instrument) – the dedicated Radiator was designed due to requirement for low operational temperature of crucial instrument subsystem. Located outside of the spacecraft and facing the Deep Space; exposed to highly radiative environment and high temperature gradients between Earth, Venus and Jupiter orbits; robust against launch vibrations; light-as-possible and optimized to provide maximal thermal efficiency. The design solution, which would successfully fulfill these - often counteracting – requirements occurred to be non-trivial. Presented design approach shows the balanced and optimized response for initial requirements, including the description of thermal performance modelling using ESATAN and structural FEM analysis calculated in NASTRAN.

Keywords: Radiator, FEM, structural analysis, thermal analysis, ESATAN, NASTRAN, JUICE, SWI